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(No Model.) 2 Sheets-Sheet 1L EQFRANKE'NBERG.

EMBROIDERING ATTACHMENT FOR SEWING MACHINES.

No. 384,198. PatentedJune 5, '1888.

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2 She'ets--Sheet 2.

No-Model.

E. PRANKE'NBERG. EMBRO'IDERING ATTACHMENT FOR SEWING MACHINES.

Patented June 5, 1888.

UNITED STATES PATENT OFFICE.

EDUARD FRANKENBERG, or HANOVER, PRUSSIA, GERMANY.

EMB ROIDERING ATTACHMENT FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 384,198, dated June 5,1888.

Application filed November 29, 1887. Serial No. 256,384.

(No model.) Patented in England November 7, 1887, No. 15,144, and

in Belgium November 30, 1887, No. 79,496.

To all whom it may concern.-

Be it known that I, EDUARD FRANKENBERG, of Hanover, in the Kingdom ofPrussia, Empire of Germany, have invented certainnew and usefulImprovements in Embroidery Attachments for Sewing-Machines, (for whichLetters Patent have heretofore been granted to me by the Government ofBelgium, dated November 30, 1887, No. 79,496, and Great Britain, datedNovember 7, 1887, No. 15,144,) of which the following is aspecification.

Heretofore sewing-machines, in order-to adapt them to be used forembroidering, had to be changed considerably, which was more or lessexpensive.

The object of my invention is to provide a new and improved embroideringattachment for sewing machines, which can be applied very easily andrapidly on one or more ma chines placed side and side, and which doesnot require any change in the construction of graph attachment.

the machine, and permits the machine to be used at intervals forordinary sewing or for embroidering, as may be desired.

In the accompanying drawings, Figure l is a side view of myimprovedattach ment for embroidering for sewingmachines applied on a machine,parts of which are broken out. Fig. 2 is a vertical longitudinalsectional view of the head on the end of the arm of the sewingmaohine,showing part of the attachment on the presserbar. Fig. 3 is a plan viewof my improved attachment. Fig. 4 is an enlarged side view of one of theconnectiug-yokes and other parts of the attachment, portions being insection. Fig. 5 is a plan view of the parts shown in Fig. 4. Fig. 6 is avertical cross sectional view of the pivot-pin of the panto- Fig. 7 is abottom view of the same, parts being in crosssection. Fig. 8 is across-sectional view of the slotted disk or button for locking thepivot-piu. Fig. 9 is a top View of thesame. Fig. lOis-a verticallongitudinal section of the same.

Similar letters of reference indicate corresponding parts.

P is the resser-bar of the sewiu machine,

on the lower end of which the presser-foot P is secured. Saidpresser-bar is provided with a collar, to, on which one end of a spiralspring, a, surrounding the presser-bar P, rests, the

upper end of the said spring resting against the top of the cavityformed in the head P of the arm P of the sewing-machine. A cap, P,

is held by a screw on that end of the presser- 5 bar I projecting beyondthe top of the head on the end of the arm, and said cap is provided witha laterally-projecting lug, V, extending over the top of the needle-barV, so that when the needle-bar reciprocates its upper end acts on thelug V, thereby raising the cap P and the presser-bar I and compressingthe spring a. When the needle-bar descends, the compressed spring itexpands, and, acting on the shoulder u, presses the presser-bar P andits foot 1? downward. As long as the needle-bar and needle are raised,the resser-foot P is raised clear of the fabric to be embroidered, thuspermitting of shifting said fabric under the needle. Whentheneedleislowered to pierce the cloth, the presser-foot is pressed bythe spring a upon said cloth or fabric.

If desired, the lugV can enter a longitudinal slot of the needle-bar, orthe lug may be provided on the needle-bar and enter a slot or recess ofthe presser-ba'r; but the construction shown is preferred as being thesimplest. The fabric, or that part of the same to be embroidered, isheld in a circular embroidering-frame, O, of the usual construction,said frame having a recess, i in the top of its rim part for receiving asegmental coupling-piece, 25, provided with an eye, t, having abinding-screw, t Thumb-screws t* serve to hold the segmentalcoupling-piece t in the recess t of the frame 0. One shank, N, of anangular bar, N, is passed through the eye t, which eye is locked in thedesired position on the said bar N by the screw t Said bar N is providedwith an upwardly-projecting part, N, having a longitudinal slot, Nthrough which the screws N are screwed into the downwardly-projectingarm H of a yoke or stirrup, H, which will be described later. Said frame0 is moved and shifted by a pantograph, which is composed of the bars ab c d and a b c d, that are united by the stirrups or yokes G and H, andalso by the yoke 1, formed on the end of the manipulating-bar F,carrying the stylus O, that is to be moved over the design to beembroidered. These bars a b c d and a b c d are provided with numerousapertures to permit of a seamed adjusting them in different positions inrelation to each other. So as to permit the working of the pantographvery readily, the bars a b c d are in different horizontal plane fromthe bars a I) c d. One end of the bar a turns on a pivot, S, projectingdownward from the angle-piece A, suitably secured on the top plate, W,of the sewing-machine or a table placed adjacent to the sewing-machine.The corresponding end of the bar (1 turns on a pivot or fixed pin, S,projecting upward from a bar, B, also fixed on the plate \V. A spring,Q, is mounted to turn on an extension of the pivot S, projecting fromthe top for the angleiron A, and the free end of the spring Q isconnected with the upper end of a standard, r, projecting upward fromthat end of the bar a opposite the one mounted to turn on the pivot S.

The pivots or pins for connecting the several bars of the pantograph areconstructed in the following manner: One end of the pivot K is screwedinto a recessed cap, I, having a cavity for receiving a spiral spring,M, surrounding the pin. At that end of the pin K opposite the onescrewed in the cap I the pin is provided with two opposite notches, z. Abutton or'disk, L, is provided with an eccentric aperture, L, and acentral aperture, L in communication with each other. The centralaperture, L is provided in its lower half with two opposite tongues, yy. Washers W are interposed between the several bars a Z) 0 (land a b cd and the yokes G, H, and I, the Washers and ends of the bars and yokesbeing so adjusted that their apertures are in line. The pivots K arethen passed through the said apertures and the spring M compressed. Thenotched end of the pin K is then passed through the eccentric aperture Lof the button L, as shown in the lower part of Figs. 4 and 5, and thensaid button is moved in the direction of the length of the slot formedby the two apertures L L so that the two tongues y pass into the notchesz of the pin K, thus preventing the withdrawing of the said pin. Thespring M presses the edge of the cap I and the under face of the buttonL against the bars or yokes, and forms a'friction-tight joint for theparts, at the same time permitting of readily shifting the parts whenrequired. The operator shifts the stylus C over the pattern or design,and by the movements of the pantograph the embroidery-holding frame 0 ismoved correspondingly under the needle. Vhenever the needle descends,the presser-foot descends with it and holds the fabric in positionduring the time it is being pierced by the needle, and when the needleis raised the presser-foot is also raised, thus permitting of shiftingtheembroidery-frame under said presser-foot and needle. Theembroideryframe can be adjusted vertically by loosening the screws N andmoving the shank N of the angle-bar N up or down. The embroideryframecan be adjusted longitudinally on the shank N of the bar N after thescrew t has been loosened, and then looked in place by means of saidnut. In case a mistake has been made the embroidery-frame O can easilybe detached by loosening the thumb-screws i. The necessary correction ofthe mistake can then be made and the frame replaced and again secured tothe coupling-piece t, and will then be in precisely the same positionthat it had before being removed.

It is evident that if the bar N is extended, as shown in dotted lines inFig. 3, a series of embroidery-holders 0 may be held on the same, itbeing evident that as many machines must be placed side by side as thereare embroidery-holders. If the pattern is to be reproduced full size andnot reduced by the pantograph, the embroidery-frame is secured on theextension of the rod F, as shown in dotted lines in Fig. 3.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. The combination of an embroideringframe providedwith an eye, a pantograpll provided with a vertical arm, and an angularconnecting-bar horizontally adjustable in said eye and verticallyadjustable on said arm, substantially as described.

2. The combination of an embroideringframe, a detachable clamp providedwith thumb-screws for attachment to said frameand with an eye, apantograph provided with a vertical arm, an angular connecting-barcomprising a horizontal arm adjustable in said eye and a slottedvertical arm vertically adjustable on said arm of the pantograph, asetscrew in said eye for clamping said bar, and screws for uniting saidvertical arms, substantially as described.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing witnesses.

EDUARD FRANKENBERG.

Witnesses:

O. Liitrren, JOHN KRAOKE.

